notification 灯与电池灯冲突

最新推荐文章于 2023-11-14 22:30:00 发布

原创最新推荐文章于 2023-11-14 22:30:00 发布 · 386 阅读

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#lights.c #notification #mtk #hardware

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本文介绍了在特定设备上实现电池指示灯控制的代码逻辑。当电池灯亮起时，通知灯将关闭；反之，则开启通知灯。同时，文章还涉及了互斥锁的使用以确保线程安全。

vendor/mediatek/proprietary/hardware/liblights/lights.c

490 static void
491 handle_speaker_battery_locked(struct light_device_t* dev)
492 {
493     if (is_lit(&g_battery)) { // 电池灯亮，notification灯就不亮
494         set_speaker_light_locked(dev, &g_battery);
495     } else {
496         set_speaker_light_locked(dev, &g_battery); /*Turkey workaround: notification and Low battery case, IPO bootup, NLED cannot blink*/
497         set_speaker_light_locked(dev, &g_notification);
498     }
499 }
500
501 static int
502 set_light_battery(struct light_device_t* dev,
503         struct light_state_t const* state)
504 {
505     pthread_mutex_lock(&g_lock);
506     g_battery = *state;
507     if (g_haveTrackballLight) {
508         set_speaker_light_locked(dev, state);
509     }
510     handle_speaker_battery_locked(dev);
511     pthread_mutex_unlock(&g_lock);
512     return 0;
513 }